Pump



oct. 9, 1934. P, SCOTT 1,976,416

1 PUMP Original Filed Oct. 20. 1930 tru #fifa/ways Patented Oct. 9, 1934' UNITED STATES PATENT oFF-ICE PUMP Application October 20, 1930, Serial No. 489,746 Renewed March 8, 1934 27 Claims. (CL 10S-148) Ihis invention relates to a pump and particularly to a pump adapted to deliver asmall quantity of fluid under great pressure and with great speed.

It has for one object to provide a pump in which the mechanical shock due to the movement of the pump and its driving mechanism is reduced to a minimum. Another object is to provide a pump in which sliding surfaces within the pressure chamber are eliminated. Another object is to provide a pump in which the'walls or a part of the walls of the pump chamber are elastic.

Other objects lwill appear from time to time in the specification and claims.

The invention is illustrated more or less diagrammatically in, the accompanying drawing, wherein- Figure 1 is a longitudinal section through the Dump;

Figure 2 is a transverse section taken at line 2-2 of Figure l;

Figure 3 is a transverse section taken at line 3-3 of Figure l. l

Like parts are designated by 'like characters throughout the specification and drawing.

A is a pump or housing base.A It may be mounted upon any suitable support and may, for example, be mounted upon an engine for which the pump is adapted to furnish fuel. The base A is provided with one or more upstanding bracket members A1 upon which collars Az may be removably fastened in any suitable manner.

B is a pump tube. It is preferably formed of a relatively flexible tubular member which may be oval in cross section as shown throughout a portion of its length. At its ends. for convenience, it may be rounded in cross section, as indicated in Figure 3 at the portions B1, B1. At each end it is preferably exteriorly threaded as at B3. Upon one end is threaded a collar B3 which removably engages and holds in position a discharge valve assembly. At its other end a collar B*l 1s removably mounted and this collar holds in position an inlet valve housing and assembly. is a. discharge valve housing provided with an opening to the interior of the tube at C1 and having a valve seat C2 formed adjacent said opening. A valve C3 is positioned within a hollow in the housing C and the valve may move into and out of seating position on the seat C2. A spring C4 which sears at one end upon the valve C3 and at the other upon a perforated connecting plug C5, normally holds the valve seated. A discharge conduit C6 may be fastened to the plug C5 by a collar C7 in any suitable manner or a discharge .connection of any suitable nature might be prof vided.

D is an inlet valve valve D1 is positioned. with a seat D2 upon seated. A spring D3 tends normally -to 'hold the valve seated. The spring, as indicated in Figure 1, bears at one end against a spiderE, which is supported from the housing D.

F is a -rocker clamp, As indicated particularly in Figure 2, the clamp is hollow and the hollow portion of the clamp is appreciably larger than the outside diameter of the tube so that the rocker clamp surrounds and dts loosely about the tube. The clamp is fitted with-an outwardly projecting member F1 to which a connecting rod or other suitable member l"a may be attached. This rod is moved backward and forward in the direction indicated by the arrows in Figure 2 to shift or oscillate the rocker clamp.

Positioned within the rocker clamp and contacting the ,spring pump tube B is a plate G. 'I'his plate may be concave on one side as at G1 to correspond more ,or less to the shape of the tube and it may have a hollow on its opposite side as at G2. The plate is preferably of such size that its edges or sides are normally out of contact with theinterior of the rocker clamp.

Intermediate the plate G and at one end of the concavity formed in the rocker clamp and preferably resting, within the hollow G1, is a block H of generally oval cross section.

Within the tube B is positioned a pair' of stiff plates I, I. As shown, these plates are preferably iiat on their interior faces and on their outsides they correspond to the inner surface of the tube B against which they lie. Between the stiff plates I there are mounted a plurality of slightly flexible corrugated plates or members Il, I1. These members tend to retain their curvature or corrugation and their number and proportions are such that they exert a pressure against the plates I and consequently against the tube B and force it outward, tending to expand or increase its minor axis.

It will be realized that vwhereas I have herewith shown and described a practical operative device, nevertheless many changes might be made in the size, shape, number and disposition of parts without departing from the spirit of my invention and I wish, therefore, that my showing be taken as in a sense diagrammatic. Particularly the form of the springs, such as the corrugated sheets I1 within the tube, might be almost inhousing within which a The housing is formed which the valve may be 0i positioned about the tube los follows:

the corrugated or bent sheets shown.

The use and operation of my invention are as The pump of this invention finds an. important application in its use as an injection pump to inject fuel into internal-combustion engines.

When so used it will be associated with the engine in any suitable fashion andthe drive will be operated ordinarilyv from the engine. llhe base is mounted in a fixed position and the tube is held against turning or other movement with respect to the base by the portions A2 and A1. The rocker clamp which is mounted about the tube is moved, tilted or rocked with a back and forth movement in the direction indicated by the arrows` in Figure 2. As the clamp rocks the tendency is for the oval strip H toroll from a position in which its minor axis is normal to the restraining surface, that is, to the plate G and the end of the clamp F, which it engages, to a position in which its major axis is normal to these surfaces. This tends to press the plate Gagainst the tube, attening it against the resistance of the members I1, forcing them inward orcompressing them, andy reducing Vits minor axis and thus decreasing its contained volume. This eiiect of flatteningthe tube B constitutes a pumping stroke. Since the volume of the tube is reduced by this, the discharge valve is opened by the increased pressure thus caused. and discharge of fluid takes place.

When the clamp is rocked or permitted to move in the reverse direction, the oval strip H returns to its former position in which its minor axis is normal to the restraining surfaces and it thus permits the compression plate G to move outwardly from the position in which the tube was compressed. The tube then moves back to its former position, under the inuence of the members I1 which assume their original position when free to do so, forcing slightly outward the walls of the tube, increasing its minor axis and its volume, thus reducing the pressure within it sufliciently to open the inlet valve to draw in` fluid. This action constitutes a suction stroke. I claim: A I

L ,In combination in a pump, a hollow memf ber, inlet and outlet means in communication therewith, means for deforming the hollow member to alter itsvolume and means for holding the hollow member at its ends against movement and means for-resisting deformation of the hollow member, said means including a resistan member.

,v 2. In combination in a pump, a hollow member, inlet and outlet means in communication therewith, means for deforming the hollow member to alter its volume and means for holding the hollow member at itsends against movement and means for resisting deformation of the hollow member, said means inoludingan approximately rigid resistance member.

3. In combination in a pump, a hollow iiexible member, inlet and outlet means in communication therewith, means for deforming the hollow member to alter'its volume and means for holding the hollow member at its ends against movement and means for resisting deformation of the hollow member, said means including within the hollow member a resistance member.

4. In combination in a pump, a hollow member, inlet and outlet means in communication therewith, means for deforming the hollow member t0 alter its volume and means for resisting deformation of the hollow member, said means including within the hollow member a resistance'member and a plurality of rigid contact members, the

contact members bearing 'against the inside ofy including within the hollow member an approximately rigid resistance member and a plurality of rigid contact members, the contact members bearing against the inside of the hollow member and the approximately rigid resistance member bearing against the contact members.

6. In combination in a pump, a hollow flexible member, inlet and outlet means in communication therewith, means for deforming the hollow member to alter its volume and means for 'resisting deformation of the hollow member, said means including within the hollow member an approximately rigid resistance member and a plurality of rigid contact members, the contact members bearing against the inside of the hollow member and the approximately rigid resistance member bearing against the contact members.

7..In combination in a pump, a hollow flexible tubular member, inlet and outlet means in communication therewith, means for deforming the hollow member to alter its Volume and means for resisting deformation of the hollow member, said means including a resistance member.

8. In combination in a pump, a hollow flexible tubular member, inlet and outlet means in communication therewith, means for deforming the hollow member to alter its volume and means for holding the hollow member at its ends against movement and means for resisting deformation oi the hollow member, said means including a resistance member.

9. In combination in a pump, a hollow exible tubular member, inlet and outlet means in communication therewith, means for deforming the hollow member to alter its volume and means for resisting deformation of the hollow member, said means including an approximately rigid resistance member.

10. In combination in a pump, a hollow iexible tubular member, inlet and outlet means in communication therewith, means for deforming the hollow member to alter its volume and means for holding the hollow member at its'ends against movement and means for resisting deformation of .the hollow member, said means including an approximately rigid resistance member.

11. In combination in a pump, a hollow flexible tubular member, inlet and outlet means in communication therewith, means for deforming the hollow member to alter its volume and means for holding the hollow member at its ends against movement and means foiresisting deformation of the hollow member, said means including within the'hollow member an approximately rigid rersistancemember.

l2. In combination in a pump, a hollow flexible tubular member, inlet and outlet means in communication therewith, means for deforming the hollow member to aiter its volume and means for holding the hollow member at its ends against movement and means for resisting' deformation or the hollow member, said means including within the hollow member an approximately rigid re- A1`,a'z'c',-a.1e v 4 'hollow tubular member toalter vits volume, said sistance member, and a plurality ofrlgid con-y tact members, the contact members bearing. against the inside of the hollow member and the approximately rigid resistance Vmember bearing against the. contact members. 1

. .13. In combination ina pump, ahollow. member defining a pump chamber, inlet and outlet means therefor, means -for deforming said hollow member to alter its volume, said means including a housing part, and a wedge, and means for moving the housing-with relation to the hollow member'to operate the wedge to bring pressure upon the hollow member to` deforxn it.

14. In combination in a pump, a hollow member defining a pump chamber, inlet and outlet means therefor, means for deforming said hollow member to alter its volume, said means including a housing part, and a wedge, and means for moving the housing with relation to the hollow member to operate the wedge to bring pressure upon the hollow member to deform it, and means for holdlng the ends of the hollow member against movement.

l5. In combination in a pump, a hollow member deilning a pump chamber, inlet and outlet means therefor, means for deiorming said hollow member to alter its volume, said means including a housing part, a compression part and a wedge, and

means for moving the housing with relation to` the hollow member to operate the wedge to bring pressure through the compression block upon the hollow member to deform it.

lo. In combination in a pump, a hollow member denning a pump chamber, inlet and outlet means therefor, means for deforming said hollow memher to alter its volume, said means including a housing part. a compression part and a wedge, and means for moving the housing with relation tu the hollow member to operate the wedge to bring pressure through the compression block -upon the hollow member to deform it and means for holding the ends of the hollow member against movement.

17. In combination in a pump, a hollow tubular member, defining a pump chamber, inlet and outlet means therefor, means for deforming said hollow tubular member to alter its volume, said means including a housing part, and a wedge, and means for moving the housing with relation to the hollow member to operate the wedge to bring pressure upon the hollow member to deform vit and means for holding the ends of the hollow tube member against movement.

18. In combination in a pump, a hollow tubular member, defining a pump chamber, inlet and outlet means therefor, means for deforming said hollow tubular member to alter its volume, said means including a housing part, surrounding the hollow tubular member, and means for moving the housing with relation to the hollow member to bring pressure upon the hollow member to deform it.

19. In combination in a pump, a hollow tubular member, defining a pump chamber, inlet and outlet means therefor, means for deforming said hollow tubular member to alter its volume, said means including a housing part, surrounding the hollow tubular member, and means for moving the housing with relation to the hollow member to bring pressure upon the hollow member to cle- 'form it, and means for holding the ends of the hollow tube member against movement.

2u. combination in a pump, a hollow tubulas' member, defining a pump chamber, inlet and outlet means therefor, means for deforming said means including a housing part surrounding the hollow tubular member, a compression part and a wedge, and means for moving the housing with relation to the hollow` member to operate the tion to the hollow member to bring pressure upon the hollow member to deform it.

22. In combination in a pump, a hollow member, dening a pump chamber, inlet and outlet means therefor, means ordeforming'said hollow member to alter its volume, said means including a housing part surrounding the hollow member, a. `compression part within and out oi' contact with the housing and contacting the hollow tubulin member, and means for moving the housing with relation to the lhollow member to bring pressure .through the compression block upon the` hollow lv member to deform it.

23. In combination in a pump, a hollow member, dening a pump chamber, inlet and outlet means therefor, means for deforming said hollow,

member to alter its volume, said means including a housing part surrounding the hollow member, a compression part within and out of contact with the housing and contacting the hollow member, and a wedge, and means for moving the housing withrelation to the hollow member to operate the wedge to bring pressure through the compression block upon the hollow member. to deform it.

24.' m combination in a pump, a hollow member, defining a pump chamber, inlet and outlet means therefor, means for deforming said hollow member to alter its volume, said means including a housing part surrounding the hollow member, a compression part within and out of .contact with the housing and contacting the hollow member, and a wedge, and means for moving the housing with relation to the hollow member to operate the wedge to bring pressure through the compression block upon the hollow member to deforin it, and means for holding the ends of the hollow member against movement.

25. In combination in a pump, a hollow tubular member, dening a pump chamber, inlet and outlet means therefor, means for deforming said hollow tubular member to alter its volume, said means including a housing part surrounding the hollow tubular member, a compression part within and out of contact with the housing and contacting the hollow tubular member, and a wedge, and means for moving the housing with relation to the hollow memberto operate the wedge to bring pressure through the compression block upon the hollow member to deform it.

26. In combination in a pump, a hollow tubular member, dening a pump chamber, inlet an oulet means therefor, means for deforming said hollow tubular member to alter its volume, said means including a housing part surrounding the hollow tubular member, a compression part within and out of contact with the housing and contacting the hollow tubular member, and a wedge, and means for moving the housing with relation to the hollow member to operate the wedge to bring pressure through the compression block upon the hollow member to deform it, and means tactlng'the hollow tubular member. and a. rocker wedge within and contactingthe housing and the compression member, and means for moving the housing with relation to the hollow member to operate the wedge to bring pressure through the compression block upon the hollow member to delorm it, and means tor holding the ends of the hollow tube member against movement.

PHIHP LANE SCOTT. 

